Lower Exhaust Bellow for OMC Cobra and Volvo Penta Stern Drives – Replaces 3852742
Lower Exhaust Bellow for OMC Cobra and Volvo Penta Stern Drives – Replaces 3852742 is backordered and will ship as soon as it is back in stock.
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Lower Exhaust Bellow for OMC Cobra and Volvo Penta Stern Drives – R...
Lower Exhaust Bellow for OMC Cobra and Volvo Penta Stern Drives – Replaces 3852742 is backordered and will ship as soon as it is back in stock.
Product Details
This lower exhaust bellow is an aftermarket replacement for selected OMC Cobra and Volvo Penta stern-drive applications. This listing identifies it as an exhaust bellow for engines using OEM reference 3852742.
The bellow installs in the lower exhaust position and is supplied as a single replacement bellow. It is intended to restore the exhaust hose connection when the original component is cracked, split, deteriorated, or leaking.
- Lower exhaust bellow for OMC Cobra and Volvo Penta stern drives.
- Single replacement component; clamps are not included.
- Rubber bellow construction for marine exhaust-system service.
- Verify the exact engine model, application, and original part number before ordering.
Part Number Matrix
The following OEM and aftermarket reference numbers are listed for identification and cross-reference purposes. Number listings do not replace application verification.
| Brand or Reference Type | Part Number |
|---|---|
| Volvo Penta OEM | 3852742 |
| Volvo Penta OEM reference | 912376 |
| Volvo Penta OEM reference | 913592 |
| OMC / Evinrude / Johnson OEM reference | 778066 |
| Evinrude OEM reference | 0912376 |
| Johnson OEM reference | 0913592 |
| Listed OEM reference | 3853608 |
| Sierra Marine aftermarket reference | 18-2781 |
| Mallory Marine aftermarket reference | 9-72801 |
| GLM aftermarket references | 89222, 89230 |
Engine and Model Compatibility
This lower exhaust bellow is listed for the following OMC Cobra and Volvo Penta stern-drive engine applications:
| Drive Brand | Engine Model | Application Notes | Primary OEM Reference |
|---|---|---|---|
| Volvo Penta | 5.0L FL, GL, GXI, OSI | Selected stern-drive applications | 3852742 |
| Volvo Penta | 5.7L GL, GI, GXI, GIL, GXIL, OSI, OSXI | Selected stern-drive applications | 3852742 |
| Volvo Penta | 5.8L FL, FSI | Selected stern-drive applications | 3852742 |
| Volvo Penta | 7.4L GL, GI, GSI | Selected stern-drive applications | 3852742 |
| Volvo Penta | 8.1L | Selected stern-drive applications | 3852742 |
| Volvo Penta | 8.2L GL, GSI | Selected stern-drive applications | 3852742 |
| OMC Cobra | Applications using the listed 5.0L, 5.7L, 5.8L, 7.4L, 8.1L, and 8.2L engine configurations | Confirm the exact Cobra drive and engine configuration before installation | 3852742 |
Model and engine listings must be kept together with the stern-drive application. Do not rely on engine displacement alone; compare the original bellow and verify the reference number before purchase.
Technical Specifications
- Product Type
- Lower exhaust bellow
- Application
- OMC Cobra and Volvo Penta stern drives
- Primary OEM Reference
- 3852742
- Construction
- Rubber bellow
- Installation Position
- Lower exhaust position
- Fitting Type
- Exhaust hose connection
- Product Format
- Single replacement bellow
What's in the Box
- 1 x Lower exhaust bellow
Hose clamps and other installation hardware are not included.
Installation Notes
- Turn off the engine and disconnect the battery before beginning work.
- Gain clear access to the lower exhaust bellow on the stern drive.
- Loosen and remove the clamps securing the old bellow at both ends.
- Remove the old bellow carefully and note its orientation before disposal.
- Clean and inspect both mounting surfaces for corrosion, damage, or debris.
- Confirm that the replacement bellow matches the original length, openings, and orientation.
- Position the new bellow without twisting, folding, or pinching it.
- Install and tighten suitable hose clamps evenly at both connections.
- Reconnect the battery and inspect for exhaust or water leakage after installation.
Professional installation is recommended when access is restricted or when the stern-drive assembly requires removal.
Troubleshooting and FAQ
How do I know if the lower exhaust bellow needs replacement?
Inspect for cracks, splits, hardened or deteriorated rubber, loose connections, abnormal exhaust noise, or evidence of water leakage. Replace the bellow if it is damaged or no longer seals correctly.
Will this bellow fit every OMC Cobra or Volvo Penta stern drive?
No. This listing covers selected OMC Cobra and Volvo Penta applications, including the listed 5.0L, 5.7L, 5.8L, 7.4L, 8.1L, and 8.2L configurations. Verify the exact engine model, drive configuration, and original part number before ordering.
Is this an OEM bellow?
No. This listing is for an aftermarket replacement bellow. OEM and aftermarket reference numbers are provided for identification and application checking.
Are hose clamps included?
No. The package contains one lower exhaust bellow only. Hose clamps are not included and should be replaced if the existing clamps are corroded, damaged, or unable to maintain a secure seal.
Can I use the reference number by itself to confirm fitment?
Use the reference number together with the drive brand, engine model, application, and the physical characteristics of the original bellow. A number match by itself does not confirm every year or configuration.
What can happen if a damaged exhaust bellow is left in service?
A leaking or failed bellow can allow exhaust or water leakage and may contribute to damage in surrounding stern-drive or bilge components. Inspect and replace it promptly when deterioration is found.
Safety and Important Information
- Verify the application and compare the original component before purchase.
- Do not install a bellow that differs in opening size, length, or orientation from the required application.
- Disconnect the battery and allow the engine and exhaust components to cool before installation.
- Use appropriate marine-grade clamps and follow the engine and stern-drive manufacturer's service procedures.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for practical maintenance and repair applications.
- Application-Focused Listings — Product references and fitment details are provided to help you compare the replacement with your original part.
- Support for Fitment Checks — Verify the engine, stern-drive configuration, and reference numbers before ordering.
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